Mosquito season in Hancock County, MS: when it starts and ends

Mosquito months in Hancock County

In a normal year mosquito season in Hancock County, MS starts around February 16 and ends around December 4, about 42 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Hancock County, and when

• Start tipping out standing water weekly by February 2.
• Book any yard treatment for mid February, ahead of the July peak.
• Repellent can go away after December 4.
• 1 West Nile case since 2016 (last 2024): you should use repellent at dusk May to September, more so if over 60.

Hancock County against the rest of MS

Hancock County has the 10th longest season of 82 MS counties, at 291 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 66.2°F.

• Warren County: February 8 to December 4 (299 days, 1 WNV)
• Jackson County: February 12 to December 8 (299 days, 11 WNV)
• Marion County: February 19 to December 4 (288 days, 4 WNV)
• Issaquena County: February 21 to December 6 (288 days, 0 WNV)

West Nile in Hancock County

From 1999 to 2025, CDC ArboNET counted 12 human West Nile cases in Hancock County (3 neuroinvasive) across 5 years. The worst was 2012 with 7; the latest was 2024.

More: how the dates are worked out · when the season starts across the US.